Maximize the efficiency of magnification transitions with fluid precision using our throw lever. Constructed of skeletonized, lightweight, tough, hard-coat anodized machined aluminum. Compatible with all configurations of Viper® PST™ GEN II riflescopes. Adjust the magnification of your Vortex Viper PST Gen II riflescope quickly and easily with the Vortex SV-5 Switchview Throw Lever. It installs on the magnification ring of your scope in minutes, using the included Allen wrench, and lets you adjust the magnification with a fast, fluid movement.